[R] NAs introduced by coercion warning?

[Jonathan Greenberg]

I'm running a decision tree on a large dataset, and I'm getting multiple
instances of "NAs introduced by coercion" (> 50).  What does this mean?

--j

-- 
Jonathan Greenberg
Graduate Group in Ecology, U.C. Davis
http://www.cstars.ucdavis.edu/~jongreen
http://www.cstars.ucdavis.edu
AIM: jgrn307 or jgrn3007
MSN: jgrn307 at msn.com or jgrn3007 at msn.com